** Archaeologists in Germany Uncover Rare, 2,600-Year-Old Celtic Wooden Burial Chamber
Archaeologists have discovered a remarkably preserved Celtic burial chamber near the town of Riedlingen, southern Germany. The 11x13 foot wooden structure, dated to around 585 B.C., is only the second well-preserved Celtic burial chamber found in Germany.

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Source: https://www.livescience.com/archaeology/2-600-year-old-celtic-wooden-burial-chamber-of-outstanding-scientific-importance-uncovered-by-archaeologists-in-germany